Cap



FIG. 1 is a side elevational view of a cap showing my new design, as seen when worn, the opposite side being a mirror image thereof, the broken lines indicate environmental structure and form no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a rear elevational view thereof. 

The ornamental design for a hair-enclosing cap, as shown and described. 